CVE-2014-7155: Medium severity xen xapi vulnerability
The x86emulate function in arch/x86/x86emulate/x86emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2014-7155?
CVE-2014-7155 has a medium severity rating due to its potential to allow local users to crash the guest system or escalate privileges.
How do I fix CVE-2014-7155?
To fix CVE-2014-7155, upgrade to the latest Xen version that incorporates the necessary patches.
What types of systems are affected by CVE-2014-7155?
CVE-2014-7155 affects Xen versions 4.4.x and earlier, along with multiple specific earlier versions.
Can CVE-2014-7155 lead to any security breaches?
Yes, CVE-2014-7155 can potentially lead to security breaches by allowing local users to gain kernel mode privileges.
Who is impacted by CVE-2014-7155?
Local users of HVM guests running vulnerable versions of Xen are impacted by CVE-2014-7155.